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fix(claude-agent-sdk): Don't drop tool spans for spawning subagents#1779

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Luca Forstner (lforst) merged 8 commits intomainfrom
lforst/claude-agent-tool-span
Apr 13, 2026
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fix(claude-agent-sdk): Don't drop tool spans for spawning subagents#1779
Luca Forstner (lforst) merged 8 commits intomainfrom
lforst/claude-agent-tool-span

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Fixes #1657

Base automatically changed from lforst/claude-task-events to main April 10, 2026 15:49
…ool-span

# Conflicts:
#	e2e/scenarios/claude-agent-sdk-instrumentation/assertions.ts
#	js/src/instrumentation/plugins/claude-agent-sdk-plugin.ts
@lforst Luca Forstner (lforst) merged commit ae4c629 into main Apr 13, 2026
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@lforst Luca Forstner (lforst) deleted the lforst/claude-agent-tool-span branch April 13, 2026 09:40
@github-actions github-actions bot mentioned this pull request Apr 15, 2026
Luca Forstner (lforst) added a commit that referenced this pull request Apr 16, 2026
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# Releases
## braintrust@3.9.0

### Minor Changes

-
[#1824](#1824)
[`c980e07`](c980e07)
Thanks [@lforst](https://github.com/lforst)! - feat: Add reranking
instrumentation for AI SDK and Openrouter SDK

-
[#1738](#1738)
[`25d25d5`](25d25d5)
Thanks [@AbhiPrasad](https://github.com/AbhiPrasad)! - - feat: Add
instrumentation for @huggingface/inference
([#1807](#1807))
- feat: Add cohere-ai instrumentation
([#1781](#1781))
- fix: Capture anthropic server tool use inputs for streaming APIs
([#1776](#1776))
- feat: Capture grounding metadata for Google GenAI
([#1773](#1773))
- fix(claude-agent-sdk): Don't drop tool spans for spawning subagents
([#1779](#1779))
- feat: Track server tool use metrics for anthropic SDK
([#1772](#1772))
- fix(openai): Collect logprob and refulsals output for streaming APIs
([#1774](#1774))
- perf: Remove zod from deepCopyEvent
([#1796](#1796))
- fix(test): Double timeout for slow OpenAI API tests
([#1794](#1794))
- feat(claude-agent-sdk): Improve task lifecycle and lifecycle details
([#1777](#1777))
- ci(deps): bump actions/github-script from 8.0.0 to 9.0.0
([#1783](#1783))
- ci(deps): bump docker/setup-buildx-action from 3.12.0 to 4.0.0
([#1782](#1782))
- chore: Don't use environment (ie. github deployments) for canary tests
([#1775](#1775))
- chore: Make dependabot less annoying
([#1778](#1778))
- fix(auto-instrumentation): Upgrade @apm-js-collab/code-transformer to
v0.12.0
([#1708](#1708))
- fix(auto-instrumentation): Use sync channel for AI SDK CJS
streamText/streamObject in v4+
([#1768](#1768))
- fix: Give AI SDK top-level api spans type function
([#1769](#1769))

-
[#1814](#1814)
[`d9b9923`](d9b9923)
Thanks [@lforst](https://github.com/lforst)! - - feat: Add per-input
trialCount support to Eval()

-
[#1821](#1821)
[`1b5de11`](1b5de11)
Thanks [@lforst](https://github.com/lforst)! - feat: Instrument Google
GenAI embedContent for text

### Patch Changes

-
[#1825](#1825)
[`f389036`](f389036)
Thanks [@lforst](https://github.com/lforst)! - fix(ai-sdk): Restore
prompt cache metrics

-
[#1813](#1813)
[`2434a0e`](2434a0e)
Thanks [@lforst](https://github.com/lforst)! - fix(openai-agents): End
child spans on trace end

-
[#1836](#1836)
[`5581357`](5581357)
Thanks [@stretpjc](https://github.com/stretpjc)! - feat: Add
x-bt-use-gateway header to allowed CORS headers

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Luca Forstner <luca.forstner@gmail.com>
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ClaudeAgentSDKPlugin should not drop Agent tool spans in auto-instrumented mode

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